A more thorough explanation:

HENCEFORTH

henceforth, adv. From now on. For example, "The newly enacted rule will apply henceforth."

Henceforth means starting from this point forward. It is used to indicate that something will be true or applicable from now on. For instance, if a new law is passed, it will apply henceforth, meaning that it will be enforced from that moment on.

• Henceforth, all employees must wear a uniform to work.
• The company has decided to switch to a new software system henceforth.
• Henceforth, all meetings will be held on Fridays.

These examples illustrate how henceforth is used to indicate that something will be true or applicable from a certain point forward. In the first example, the rule about wearing a uniform will be enforced from now on. In the second example, the new software system will be used from this point forward. In the third example, all meetings will be held on Fridays starting from now.